pqTreeViewExpandState Class Reference

save/restore expand-state for items in a tree view. More...

#include <pqTreeViewExpandState.h>

Inherits QObject.

Public Member Functions
	pqTreeViewExpandState (QObject *parent=nullptr)
	~pqTreeViewExpandState () override
void	save (QTreeView *treeView)
void	restore (QTreeView *treeView)

Detailed Description

save/restore expand-state for items in a tree view.

pqTreeViewExpandState is a helper class that can be used to save/restore expansion state for nodes in the tree view even after the view's model has been reset or severely modified.

Example usage:

pqTreeViewExpandState helper;
helper.save(treeView);

treeView->model()->reset();
// do other changes to model.

// optional default expand state.
treeView->expandToDepth(1);

helper.restore(treeView);

Applications often want to have a default expand state for tree views. To do that, simply call QTreeView::expand, QTreeView::expandAll, or QTreeView::expandToDepth before calling restore. pqTreeViewExpandState ensures that it doesn't not save (and hence restore) state for the tree if the tree has only 1 or less nodes when save is called.

Definition at line 43 of file pqTreeViewExpandState.h.

Constructor & Destructor Documentation

pqTreeViewExpandState()

pqTreeViewExpandState::pqTreeViewExpandState

(

QObject *

parent = nullptr

)

~pqTreeViewExpandState()

pqTreeViewExpandState::~pqTreeViewExpandState ( )

override

Member Function Documentation

save()

void pqTreeViewExpandState::save

(

QTreeView *

treeView

)

restore()

void pqTreeViewExpandState::restore

(

QTreeView *

treeView

)

---

The documentation for this class was generated from the following file:

• /builds/gitlab-kitware-sciviz-ci/Qt/Widgets/pqTreeViewExpandState.h